The underground (a Undertale story)

After muffet

Mettaton's poster hung up on the wall beside you. You sigh, and wonder how can anybody like a blood thirsty robot like him. You continue to walk and see Mettaton in your way! You gasp and look away. Mettaton begins to sing a beautiful song. With the sarcastic robot doesn't let you go.
Boom! At the end of the song the robot drops you into a long whole. Thankfully you land on your feet. You look around, confusedly.
You saw the puzzle Papyrus tried to work on you, but was to hard to remember all the colors patterns. "Well, just hurry! Since you already know how this works, go ahead! I don't want to waste my time telling you the rules." Mettaton watched you carefully.
You try to walk on the puzzle, but time was already up! The walls were burning red fire! They tried to crush you, but thankfully Alphy saved you.
She hacked into the system. You thanked her so much. Alphy blushes and looked away. "U-uh.. N-no-your right, thank you, also!"